1// Copyright 2020 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package fs_test
6
7import (
8	"fmt"
9	. "io/fs"
10	"testing"
11)
12
13type statOnly struct{ StatFS }
14
15func (statOnly) Open(name string) (File, error) { return nil, ErrNotExist }
16
17func TestStat(t *testing.T) {
18	check := func(desc string, info FileInfo, err error) {
19		t.Helper()
20		if err != nil || info == nil || info.Mode() != 0456 {
21			infoStr := "<nil>"
22			if info != nil {
23				infoStr = fmt.Sprintf("FileInfo(Mode: %#o)", info.Mode())
24			}
25			t.Fatalf("Stat(%s) = %v, %v, want Mode:0456, nil", desc, infoStr, err)
26		}
27	}
28
29	// Test that Stat uses the method when present.
30	info, err := Stat(statOnly{testFsys}, "hello.txt")
31	check("statOnly", info, err)
32
33	// Test that Stat uses Open when the method is not present.
34	info, err = Stat(openOnly{testFsys}, "hello.txt")
35	check("openOnly", info, err)
36}
37